Question

Without actually calculating
cubes, find the value of
(-15) + (10)3+(5)3​

Answer 1

Answer:

30

Step-by-step explanation:

(-15)+30+15

-15+45

30

Answer 2

Answer: -2250

Step-by-step explanation:  Here we have -15³ + 10³ = 5³, so we will use a identity :

Identity : if a + b + c = 0 ; then a³ + b³ + c³ = 3abc

Now let us assume :

a = -15

b = 10

c = 5

Now lets add them -15 + 10 + 5 =0

So we can conclude -15³ + 10³ + 5³ = 3(-15)(10)(5)

                                                           = -2250

                                                          = -2250

therefore -15³ + 10³ = 5³ = -2250( WITHOUT ACTUALLY CALCULATING THE CUBES)